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dc.contributor.advisorOlmstead, Richard G
dc.contributor.authorRagsac, Audrey Claire
dc.date.accessioned2020-02-04T19:24:26Z
dc.date.submitted2019
dc.identifier.otherRagsac_washington_0250E_20947.pdf
dc.identifier.urihttp://hdl.handle.net/1773/45117
dc.descriptionThesis (Ph.D.)--University of Washington, 2019
dc.description.abstractBignoniaceae is a flowering plant family of ca. 850 species. The family has the highest species diversity in the Neotropics, but taxa are also found in tropical Africa and Asia, as well as the temperate zones in both the Northern and Southern hemisphere. This widespread distribution allowed me to ask questions about how three of these lineages- Tecomeae, Jacarandeae, and Crescentieae- achieved their current global, Neotropical, and Central American distributions, respectively. Using a combination of molecular phylogenetic and biogeographic methods, I inferred the evolutionary relationships of species in these groups, then used the resulting phylogenies, along with fossil calibrations and species distributions, to estimate divergence times, perform ancestral state reconstructions, and infer diversification rates to explore temporal and spatial patterns of evolution and dispersal. Tecomeae is inferred to have originated in the Neotropics about 40 Ma, likely achieving its current distribution via a combination of overland and overwater dispersal aided by wind-dispersed seeds. Jacarandeae is estimated to have originated in the Neotropics also, achieving its current distribution by dispersing within and across the many biomes of the region over the past 23 Ma. Crescentieae, restricted to Central America and the West Indies, is unique in the family for having fleshy fruit that is likely adapted for dispersal by now extinct megafauna or water.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.rightsnone
dc.subjectBignoniaceae
dc.subjectbiogeography
dc.subjectdispersal
dc.subjectevolution
dc.subjectNeotropics
dc.subjectphylogenetics
dc.subjectBiology
dc.subjectBotany
dc.subjectEvolution & development
dc.subject.otherBiology
dc.titleMade in the Americas: How three lineages of flowering plants evolved and dispersed across the Neotropics and the World
dc.typeThesis
dc.embargo.termsRestrict to UW for 5 years -- then make Open Access
dc.embargo.lift2025-01-08T19:24:26Z


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